<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Document</title>
    <style>
      * {
        margin: 0;
        padding: 0;
        list-style: none;
      }
      .mark {
        width: 100%;
        height: 100%;
        position: absolute;
        top: 0;
        background: rgba(0, 0, 0, 0.4);
      }

      .text {
        width: 175px;
        height: 200px;
        position: absolute;
        top: 200px;
        left: 100px;
        background: #fff;
      }
    </style>
  </head>

  <body>
    <div id="app">
      <h4 v-show="filterList.length > 0">
        我的兴趣爱好是:
        <span v-for="(item, index) in filterList"> --{{ item.title }} </span>
      </h4>
      <button @click="isShow">点击</button>
      <my-dialog v-show="flag" @send="changeFlag"></my-dialog>
    </div>

    <!-- 弹框 -->
    <template id="dialog">
      <div class="mark">
        <div class="text">
          <ul>
            <li v-for="(item, index) in list">
              <input v-model="item.check" type="checkbox" />
              {{ item.title }}
            </li>
          </ul>

          <button @click="cancel">取消</button>

          <button @click="success">确定</button>
        </div>
      </div>
    </template>

    <script src="../vue.js"></script>
    <script>
      const Dialog = {
        template: "#dialog",
        data() {
          return {
            list: [
              {
                title: "篮球",
                check: false,
              },
              {
                title: "足球",
                check: false,
              },
              {
                title: "排球",
                check: false,
              },
            ],
          };
        },
        methods: {
          // 取消
          cancel() {
            this.$emit("send", {
              flag: false,
            });
          },
          // 确定
          success() {
            this.$emit("send", {
              flag: false,
              list: JSON.parse(JSON.stringify(this.list)),
            });
          },
        },
      };

      new Vue({
        el: "#app",
        computed: {
          filterList() {
            return this.list.filter((item) => item.check);
          },
        },
        data() {
          return {
            flag: false,
            list: [],
          };
        },
        components: {
          "my-dialog": Dialog,
        },
        methods: {
          isShow() {
            this.flag = true;
          },
          // 取消
          changeFlag({ flag, list }) {
            this.flag = flag;
            // 点击了确定
            if (list) {
              this.list = list;
            }
          },
        },
      });
    </script>
  </body>
</html>
